Focal Length Calculator - Lens Minimum Focusing Distance

This calculator computes the required focal length to take a picture of an object from the given distance in order to generate an image fitting on your camera sensor size.

Focal Length Calculator

Object size:	mm
Image size:	Select 1/4" 3.6 1/3" 4.8 1/2" 6.4 2/3" 8.8 1" 12.8 mm
Object distance:	m
Magnification:	x
Focal length:	mm
Angle of view:	°

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• Magnification Calculator